“We are working hard to identify the two men responsible for this crime and I’m once again urgently appealing for anyone who may have witnessed the incident, or anyone who has information, to contact us immediately.

“We will be carrying out a number of patrols in the area to provide reassurance to residents and deter others from carrying out similar offences.”

The victim, who police are not naming, was admitted to hospital on the day of her death.

Both men are described as white and aged around 16. One is described as thin and wearing a blue linen style hat and a navy T-shirt. The second is described as wearing dark clothing and a dark baseball cap.